南海天然气水合物分解的碳同位素证据

王淑红; 颜文; 陈忠; 陈木宏; 宋海斌

doi:10.3799/dqkx.2010.068

Volume 35 Issue 4

Jul. 2010

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Article Navigation > Earth Science > 2010 > 35(4): 526-532

WANG Shu-hong, YAN Wen, CHEN Zhong, CHEN Mu-hong, SONG Hai-bin, 2010. Carbon Isotope Evidence of Gas Hydrate Dissociation in South China Sea. Earth Science, 35(4): 526-532. doi: 10.3799/dqkx.2010.068

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WANG Shu-hong, YAN Wen, CHEN Zhong, CHEN Mu-hong, SONG Hai-bin, 2010. Carbon Isotope Evidence of Gas Hydrate Dissociation in South China Sea. Earth Science, 35(4): 526-532. doi: 10.3799/dqkx.2010.068

WANG Shu-hong, YAN Wen, CHEN Zhong, CHEN Mu-hong, SONG Hai-bin, 2010. Carbon Isotope Evidence of Gas Hydrate Dissociation in South China Sea. Earth Science, 35(4): 526-532. doi: 10.3799/dqkx.2010.068

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Carbon Isotope Evidence of Gas Hydrate Dissociation in South China Sea

doi: 10.3799/dqkx.2010.068

WANG Shu-hong^{1, 2
,},
YAN Wen^{1, 2},
CHEN Zhong^{1, 2},
CHEN Mu-hong¹,
SONG Hai-bin^{2, 3}

1.
CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China
3.
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2009-10-15
Publish Date: 2010-07-01

Abstract

Abstract

High-resolution carbon and oxygen isotope analysis for cores NS93-5 and NS97-37 from southern South China Sea (SCS) shows the rapid negative excursion of carbon isotope in the last deglaciation (about 18 ka) and the penultimate deglaciation (about 130 ka). In the same layer, the oxygen isotope also displays similar phenomena. It is found that the Globigerinoides rubber (Pink) died out in midpoint of MIS 5/6 (about 129.84 ka). The change of carbon and oxygen isotope is in consonance with atmospheric methane concentration from the Vostok ice core. The two rapid negative excursions of carbon isotope recorded in SCS are likely related to gas hydrate dissociation, i.e. the changes of temperature and pressure induced gas hydrate dissociation and released methane in SCS and/or other areas, which made the climate warmer, ocean anoxic and further led to the extinction of some marine organism and accelerated glacial termination.
- South China Sea,
- gas hydrates,
- carbon isotope

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References(50)

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Carbon Isotope Evidence of Gas Hydrate Dissociation in South China Sea

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